巻号一覧
14 巻, 1 号
選択された号の論文の2件中1～2を表示しています
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辻 茂, 山根 隆一郎, 吉田 靖正, 石橋 幸男1983 年 14 巻 1 号 p. 77-85
発行日: 1983年
公開日: 2010/10/21
ジャーナル フリーIn an oil-pressure circuit with conventional flow control valves jumping or shock often occurs when the actuator starts or stops, which causes much trouble such as damage to driven tools or works.
In this study a new-type flow control valve mechanism was presented to eliminate such jumping or shock motion. Analytical study revealed its characteristics better than conventional ones. A sample valve was manufactured and tested. Experimental results also revealed much smoother motion of the hydraulic cylinder.
In this valve a throttle valve and a compensator are separated, the former being connected to the meter-in line and the latter to the meter-out line, so that the latter may be always in operating condition. The opening area of the throttle valve is not fixed but is increased slowly to its final value.抄録全体を表示PDF形式でダウンロード (1179K) -
氏家 康成, 西野 宏1983 年 14 巻 1 号 p. 86-93
発行日: 1983年
公開日: 2010/10/21
ジャーナル フリーIn rotary-vane type vacuum pumps, the friction torque which is generated between vane-tips and sliding surface of the stator is so large, that it increases considerably at high speed operation. The recent advance in speed up of the pump has posed an important problem of reducing the friction loss at vane-tips to lower its driving torque.
Some of the results of studies made on the reduction in friction torque at vane-tips are presented in this paper as follows.
(1) Applying the Reynolds equation on a viscous lubrication of a slide bearing to vane-tips, effects of various radii of curvature at vane-tips were studied.
(2) Effects of various viscosities of lubricant were studied by the same method as (1).
(3) In terms of a swing motion of vanes, the range of choice for the radius of curvature at vane-tips was examined.抄録全体を表示PDF形式でダウンロード (1195K)
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